Canada Post, Why You Do This?

 The minute I opened the Post Office box I knew that something was wrong. I saw a plastic bag with a stack of cards in it much bigger than anything I was expecting. Upon returning to work I was quite shocked to see that what was inside the package was surprisingly intact, but was not at all what I had ordered. Instead of the single Jeff Francis 2008 Topps Finest Black card I ordered from the seller, I had received a pack of playing cards with people I have never seen before on it. It looks like some custom made thing for a gift of some sort.

I am sort of lost at what to do here, it is obvious by the size of the envelope that the seller/shipper did not sent me what arrived and that it was damaged and switched at some sorting facility along the way. The envelope even has "FRAGILE - DO NOT BEND" stamped on it. It's not really the sellers fault so starting a dispute on ebay seems a little pointless. I have received many cards shipped in an top loader inside an envelope and never had any problems and with a letter rate package there is no way to know where this happened and were my card ended up, so do I just eat it (it was only $5.59) and count it is crappy lucky or should I contact the seller and see what he says. After years of mailorder I have been lucky as my only other issue was a broken Sort Vokter record, but that was largely due to terrible packaging so maybe I was just due for something to happen.